Answer:
The correct answer is option - B. proteins.
Explanation:
The muscle contraction needs two protein that is essential in contraction. The muscle has motor protein myosin and spherical protein actin that are slide on one other in contraction that helps in muscle to contraction.
In the contraction, these protein filaments help to change in length and shape of the muscles. Thin filaments involve actin and thick filament in is myosin filaments.
Thus, the correct answer is option - b. proteins.
From the mother through the placenta
The ultimate fate of the universe is a topic in physical cosmology, whose theoretical restrictions allow possible scenarios for the evolution and ultimate fate of the universe to be described and evaluated. Based on available observational evidence, deciding the fate and evolution of the universe have now become valid cosmological questions, being beyond the mostly untestable constraints of mythological or theological beliefs. Many possible futures have been predicted by different scientific hypotheses, including that the universe might have existed for a finite and infinite duration, or towards explaining the manner and circumstances of its beginning.
Abiogenesis is another name for spontaneous generation.
